V.A.G. Service. CLIMAtronic. CLIMAtronic USE AT YOUR OWN RISK. This document is an UNOFFICIAL translation of: V.A.G. Service
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1 V.A.G. Service CLIMAtronic Construction and Function Self-Study Program 135 This document is an UNOFFICIAL translation of: V.A.G. Service CLIMAtronic Konstruction and Funktion Selbststudienprogramm Nr. 135 CLIMAtronic USE AT YOUR OWN RISK Introduction The cooling circuits of this air conditioning equipment will be known to you from the manual air conditioning in the Passat. What s new about this equipment is the electronic control hence the name: Climatronic. The essential concept of the electronic control is the continuous comparison between the actual temperature and the temperature in the sun to regulate the air temperature, airflow rate and distribution. This corresponds with your knowledge of air conditioning regulation in Audi cars. Climatronic Features: User Friendly automatic regulation of the climate in the vehicle, including comfort in extreme weather conditions; the regulation can be adjusted to suit personal preferences: - temperature - air distribution - blower speed, etc. Repair Service Friendly: The Climatronic has substantial self-diagnosis functions.
2 Contents Operation Air Distribution System Overview Climatronic Components Sensors and Actuators Connector Pin Assignments Wiring Diagram Self-Diagnosis Notice: The meaning of error codes is contained in the appropriate repair manuals or error look-up programs. NOTICE The ERROR CODES have been obtained from the net, and are located at the end of this document. NOTICE
3 Operation The operation of Climatronic is simple. It operates fully automatically and maintains the inside temperature almost constant at the selected value. Automatic operation is normally sufficient for all weather extremes and vehicle conditions. When the displayed temperature is reached, the blower motor s speed is reduced. Dashboard Vents Display Inside Temp Increase Defrost Automatic Operation Fan Speed Increase Off Fan Speed Decrease Recirculate Footwell Inside Temp Decrease Display Shows: Mode of Operation (AUTO/OFF) Temperature (Outside/Desired Inside) Air Distribution Blower Motor Speed Diagnostic Function and Error Code Number Air Conditioning Off The last selected inside temperature is remembered and the blower operation is shut off. Selector for Temperature Scale ºC or ºF
4 Air Distribution Automatic operation Individually selected air distribution Air recirculation Off Air distribution Selection Possibilities to windshield through defrost vents through dashboard vents through footwell vents All selections can be controlled individually.
5 Volkswagen Technical Site: огромный архив документации по автомобилям Volkswagen, Skoda, Seat, Audi System Overview The heart of the Climatronic system is the Control Unit. All the sensor inputs are fed into the microcomputer in the Control Unit. The microcomputer calculates the output signals based on pre-programmed values. The output signals are amplified so that they can drive the actuators. Sensors Actuators Inside Temp Sensor (G 56) with Blower (V 42) Intake Air Duct Temp Sensor (G 89) Outside Temp Sensor (G 17) Photosensor (G 107) Refrigerant Temp Sensor (G 62) Pressure Switch (F 129) Speed Sensor (G 68) Kick-down Sw (F 8) Evaporator Temp Switch (E 33) Temperature Flap Servo Central Flap Servo Dynamic Pressure Flap Servo (V 68, 70, 71) Blower Motor Control (J 126) Blower Motor (V 2) Refrigerant Cooling Fan (V 7) Valve Unit (N 53) Vacuum Units Magnetic Compressor Clutch (N 25) Relay for Magnetic Clutch (J 253) Thermal Switch for Refrigerant Cooling Fan (F 18)
6 Climatronic Components The Climatronic control unit is in the middle console, so it is easy to reach.. Control Unit Sensors Actuators
7 Sensors and Actuators Dashboard-mounted temperature switch (G 56) with blower motor (V 42) for inside temperature sensor This temperature sensor constantly monitors the inside air temperature Photosensor The signal from the photosensor causes the temperature and blower speed to increase or decrease to maintain the inside temperature constant under different sunshine conditions.
8 Intake Air Duct Temperature Sensor (G 89) Outside Air Temperature Sensor (G 17) The sensors (G 89 and G 17) constantly monitor the outside air temperature. The Control Unit evaluates the outputs of the two outside air temperature sensors and uses the lower of the 2 measured outside air temperatures to determine the control signal.
9 Refrigerant Temperature Sender (G 62) The refrigerant temperature is used to provide the maximum heat output whether the motor is warm or cold. This sensor causes the following actions when the motor is warming up: Reduces blower speed Control of air circulation Preventing the Compressor from turning. Air Conditioning Pressure Switch (F 129) This switch constantly watches the refrigerant circuits for safety reasons. The following information about the air conditioning system is provided by this switch: Pressure < 2 Bar (low pressure switch) refrigerant requires refilling >> Compressor off Pressure > 15 Bar (high pressure switch) the second-stage of the refrigerant fan (V 7) is turned on Pressure > 32 Bar (safety shut-off switch) Compressor off
10 Vehicle Speed Sender (G 68) The signal from this sensor controls the dynamic pressure Flap. Therefore, the air flow and temperature in the vehicle are kept constant despite varying vehicle speeds. Evaporator Temperature Switch (E 33) This temperature switch monitors the evaporator. When the evaporator begins to ice up, the Compressor will be shut off.
11 Kick-down Switch (F 8) The kick-down switch is installed on cars with automatic transmissions. When this switch is activated, the Digimat Control Unit (J 217) will stop the Compressor so that the vehicle can use all the vehicle s power to accelerate. Temperature Flap Servo (V 68) The servo is aligned to the Temperature Flap and is used by the Control Unit to maintain the selected inside temperature. The Temperature Flap varies the mixture of warm air so that the inside temperature is maintained as close as possible to the selected temperature under all driving conditions
12 Central Flap Servo (V 70) The position of the Central Flap is used by the Climatronic Control Unit to control air distribution as selected. The Central Flap controls the distribution of air to the dashboard vents or to the defrost and footwell vents. Dynamic Pressure Flap Servo (V 71) The position of the Dynamic Pressure Flap, the driving speed and the fan speed are used by the Climatronic to determine the control signals to the Dynamic Pressure Flap. The Dynamic Pressure Flap regulates the fresh airflow rate, allowing the inside temperature to be maintained constant.
13 Blower Motor Control (J 126) This control amplifies the Blower Motor control signal so that it can be used by the Blower Motor. This maintains the Blower Motor at the desired speed. Blower Motor (V 2) The Blower Motor is driven to the desired fan speed. When the Defrost mode is selected, the Blower Motor is automatically driven at its maximum speed.
14 Refrigerant Cooling Fan (V 7) The 2-stage fan is controlled by the Climatronic system. 1 st Stage: power supplied by Relay for Climatronic (J 254) or refrigerant fan thermal switch #1 (F 18) 2 nd Stage: power supplied by Relay for 2 nd stage Refrigerant Cooling Fan (J 101) or Refrigerant Fan Thermal Switch #2 (F 18) Valve Unit (N 53) There are 4 magnetic valves built into the Valve Unit. Depending on the air distribution, positive to negative air pressure (vacuum) will be detected. The expected pressures change according to the Climatronic s air distribution program.
15 Magnetic Compressor Clutch (N 25) The magnetic clutch stops the Compressor based on signals from the Climatronic Control Unit. Air Conditioning Relay (J 254) This relay, the Climatronic Combination Relay (106), is located in the main fuse panel. It supplies power to both the Blower Motor (V 2) and to the 1 st Stage Refrigerant Cooling Fan (V 7).
16 Relay for 2 nd -Stage Refrigerant Cooling (J 101) This relay (98) serves to trigger 2 nd -Stage Refrigerant Cooling Fan (V 7). Relay for the Magnetic Clutch (J 253) This relay (107) is supplied power from the Evaporator Temperature Switch (E 33). The electric circuit is combined with the path of the Compressor Pressure Switch (F 129) to complete the circuit to the Climatronic Control Unit. This prevents operation of the Compressor while there is insufficient refrigerant. Thermal Switch for Refrigerant Cooling Fan (F 18) The thermal switch controls both the relays for the after-run system and both Stages of the Refrigerant Cooling Fan.
17 Vacuum Units The Vacuum Units are connected to the Valve Unit (N 53) by vacuum lines, and are used to determine the position of the air distribution valves. The Climatronic s air distribution program uses the signals from these Vacuum Units. The Vacuum Units for the fresh/recirculated air valve and the valve for closing the middle plates are functionally identical. The Vacuum Unit for the middle airstream closing flap (behind the middle shut-off flap) The Vacuum Unit for the footwell/defrost switching flap The Vacuum Unit for switching the fresh/recirculated air
18 Connector Pin Assignments The following list shows the pin assignments for the plugs on the rear of the Climatronic Control Unit. Plug/Pin Function 1/1 Feedback pick-up for Dynamic Pressure Flap (V 71) 1/2 Feedback pick-up for Central Flap (V 70) 1/3 Power Supply from Circuit 15 1/4 Positive Power Source for Feedback Pick-ups (V 70 & V 71) 1/5 Ground 1/6 Negative Power Source for Feedback Pick-ups (V 70 & V 71) 1/7 Power Source for Dynamic Pressure Flap Motor 1/8 Power Source for Central Flap Motor 1/9 Power Source for Dynamic Pressure Flap Motor 1/10 Power Source for Central Flap Motor 2/1 Feedback Potentiometer Pick-Up for Temperature Flap (V 68) 2/2 Positive Power Source for Temperature Flap (V 68) 2/3 Negative Power Source for Temperature Flap (V 68) 2/4 Power Source for Temperature Flap (V 68) Motor 2/5 Power Source for Temperature Flap (V 68) Motor 3/1 Not used 3/2 Air Conditioning Ready 3/3 Air Distribution II Magnetic Flap Foot/Defrost switching 3/4 Relay for Blower Motor 3/5 Magnetic Shut-off Flap 3/6 Air Distribution I Magnetic Flap Foot/Defrost switching 3/7 Fresh/Recirculated Air Switching 3/8 Power Supply from Circuit 30 3/9 Panel Lighting (Dimming) 3/10 Ground Connection (Not used) 3/11 Vehicle Speed Potentiometer 3/12 15-Bar Pressure Switch Diagnosis Input 3/13 Signal from Kick-Down Switch (Automatic Transmission) 3/14 Not used 3/15 Negative Power Source for Blower Motor (V 2) 3/16 Positive Power Source for Blower Motor (V 2) 3/17 Signal from Photosensor (G 107) 3/18 Fan Motor for Dash-Mounted Temperature Sensor (V 42) 3/19 From Outside Air Temperature Sensor (G 17) 3/20 Control Signal to Blower Motor Amplifier (J 126) 3/21 Signal from Refrigerant Temperature Sensor (G 62) 3/22 Signal from Intake Air Duct Temperature Sensor (G 89) 3/23 +5V Power Source for Photosensor (G 107) 3/24 Dash-Mounted Temperature Sensor (G 56) 3/25 Ground for Sensors (G 56, G 62, G 89, G 107) 3/26 Power Supply from Circuit X 3/27 Diagnose Air Conditioning Pressure Switch (F 129) 3/28 Diagnose Temperature Switch on Evaporator (E 33)
19 Volkswagen Technical Site: огромный архив документации по автомобилям Volkswagen, Skoda, Seat, Audi Functional Diagram The functional diagram shows the connection between the various components. It is not a wiring diagram. E 33 F 18 F 129 G 17 G 56 G 62 G 68 G 89 G 107 J 101 J 126 J 253 J 254 J 255 N 25 N 53 Evaporator Temperature Switch Refrigerant Fan Thermal Switch Compressor Pressure Switch Outside Air Temperature Sensor Dashboard-Mounted Temperature Sensor Refrigerant Temperature Sender Driving Speed Sender Intake Air Duct Temperature Sensor Photosensor Relay For 2 nd -Stage Refrigerant Cooling Fan Blower Motor Control Unit Relay for Magnetic Clutch Relay for Climatronic Control Unit for Climatronic Magnetic Clutch for Compressor Vacuum Valve Unit S 14 Fuse in Fuse Panel (10 A) S 19 Fuse in Fuse Panel (30 A) S 21 Fuse in Fuse Panel (15 A) S 23 Fuse for Heating System (30 A) V 2 V 7 V 42 V 68 V 70 V 71 F W Y Z Blower Motor Refrigerant Fan Blower for Inside Air Temperature Sensor Servo for Temperature Flap Servo for Central Flap Servo for Dynamic Pressure Flap Signal from Kick-Down Switch Dash Lighting (Dimmable) Radiator Fan (Cooling) After-Run Prevention of Running Compressor While Empty
20
21 Self-Diagnosis The Climatronic can use its integrated Diagnostic system to test the air conditioning system. It uses innovative test methods conforming to the VW-Audi Self-Diagnostics structure. The Climatronic has 3 diagnostic functions: Retrieving stored error codes Reading measured (actual) values Self-test With these Diagnostic functions you can easily, quickly and safely test the overall effectiveness of the entire system. This means that you can diagnose: without separate test equipment Using your special knowledge, you can invoke the self-test function to: read-out codes on the Climatronic Control Unit s display In order to activate the Diagnostic functions, you must exit normal operations. To do this, you must: Turn the ignition off and press 2 buttons on the Control Unit simultaneously The selected Diagnostic function will be shown on the Control Unit s display When the Diagnostic function is invoked, it will be displayed like this: Diagnostic Function 00» Retrieving Stored Error Codes Ignition ON press 2 buttons simultaneously
22 Diagnostic Function 01» Reading measured (actual) values Ignition ON press 2 buttons simultaneously Diagnostic Function 02» Perform Self-Test Ignition OFF press 2 buttons simultaneously Ignition ON To exit the diagnostic functions, press the OFF button briefly. More information on the self-test procedures can be found in the: Reparaturleitfaden Passat 1988 > and in the Trouble-Shooting folder of the Heating and Air Conditioning assemblies. NOTICE The ERROR CODES have been obtained from the net, and are located at the end of this document. NOTICE
23 CAUTION The following PROCEDURES and ERROR CODES were obtained from the net. CAUTION Diagnostic Function 00» Retrieving Stored Error Codes XXXx 00 Ignition ON Press the AUTO key press the OFF and TEMPERATURE INCREASE buttons simultaneously for at least 3 seconds the XXXx above will be filled with the 4-digit Stored Error Code press the TEMPERATURE INCREASE button again for the next Stored Error Code when the Stored Error Code of 0000 is displayed, there are no further Stored Error Codes to DELETE the Stored Error Codes, press the OFF button for at least 3 seconds or until the code 4444 is displayed. Then release the OFF button. To exit the diagnostic function, press the OFF button once briefly Climatronic Error Codes: 0000 No (More) Codes 1111 Control Unit defective 2312 Refrigerant Temperature Sender 3133 Outside Temperature Sender 3211 Dash-Mounted Inside Air Temperature Sensor 3213 Intake Air Duct Temperature Sensor 3223 Thermal Relays For Evaporators 3224 Pressure Switches Possible Too Little Cooling Agents 3234 Blowers For Photosensor 4122 Actuator Temperature Flap 4123 Actuator Central Flap 4131 Actuator Stagnation Pressure Flap 4444 No Errors Available
24 Diagnostic Function 01» Reading Measured (actual) Values XXXx 01 START the engine Press the AUTO key press the OFF and TEMPERATURE DECREASE buttons simultaneously for at least 3 seconds The display will now alternate between two displayed values. The first is a 4-digit code to indicate which Measured Values is being read, and the second is the actual value. press the TEMPERATURE INCREASE button again for the next Measured Value To exit the diagnostic function, press the OFF button once briefly Measured Values Codes: 1231 driving speed Km/h 1323 kick-down switch 1=on 0=off (with automatic transmission) 2312 coolant temperature 3133 outside temperature 3211 temperature sensor, cockpit 3213 temperature sensors intake air duct 3223 thermal relays for evaporator 0 = openly, 1 = geschl push button switches various shifting processes 3241 photo sensor for sun exposure announcement to magnetic clutch for Compressor 0=OFF, 1=ON over 5 degrees of outside temperature, otherwise from 0000 No (more) codes Diagnostic Function 02» Perform Self-Test XXXx 02 Ignition OFF press the OFF and TEMPERATURE INCREASE buttons simultaneously for at least 3 seconds after you switch the Ignition ON To exit the diagnostic function, press the OFF button once briefly CAUTION The above PROCEDURES and ERROR CODES were obtained from the net. CAUTION
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